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Finding the Fourth Proportional to 83,640.99, 115,424.84 and 45,400.57

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Solution

The fourth proportional to 83,640.99, 115,424.84 and 45,400.57 is: 62,652.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,640.99 : 115,424.84 = 45,400.57 : x
  2. Step 2: Convert to fraction form
    83,640.99/115,424.84 = 45,400.57/x
  3. Step 3: Cross multiply
    83,640.99x = 115,424.84 × 45,400.57
  4. Step 4: Simplify right side
    83,640.99x = 5,240,353,012.59
  5. Step 5: Solve for x
    x = 5,240,353,012.59/83,640.99
  6. Step 6: Final answer
    x = 62,652.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.